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Additional Packages to Install

Introduction

This document provides a list of packages that are convenient to have on ICP machines.

Yum Repositories

For RHEL on x86 be sure to set up at least the following repositories or subscriptions (if using RHS)

  • os
  • optional
  • supplementary
  • extras

The extras repo is important for things like Ansible and some packages that are pre-reqs for Docker.

For RHEL on ppc64 be sure to set up at least the following repositories:

  • os
  • optional
  • supplementary
  • epel

The epel repo has Ansible and Docker pre-req packages in it.

TBD - Does s390x (zLinux) have any particular yum repositories that should be configured?

Python

Python 2.7.x is needed for Ansible and for the ICP installation. If your RHEL image does not have Python installed then it needs to be installed on the boot node and all cluster nodes.

Additional packages to install

This section lists some software that is needed at some time or another. These packages may not be part of a minimal RHEL server installation.

NOTE: Git, Ansible and Java are only needed on the boot/master node.

Package Install Command Comments
yum-utils yum -y install yum-utils for yum-config-manager
unzip yum -y install unzip zip archive extractor
git yum -y install git source file repo management
boot node only
jq yum -y install jq For JSON parsing in shell scripts
bind-utils yum -y install bind-utils for nslookup
net-tools yum -y install net-tools for netstat to see what ports are in use
psmisc yum -y install psmisc for fuser to find/kill processes holding file locks
lsof yum -y install lsof old school utility to find processes holding file locks
dos2unix yum -y install dos2unix for cleaning up files that come from Windows
nano yum -y install nano Text editor many people prefer over vi
vim yum -y install vim Text editor variation on vi
ansible yum -y install ansible for convenient multi-host automation
Ansible is in RHEL extras or epel repo.
boot node only
wget yum -y install wget wget is generally useful for getting various artifacts
nfs yum -y install nfs-utils Needed if you want to use NFS client or server
java yum -y install <java_package> Where <java_package> is dependent on JDK/JRE version.
Java may be needed for keytool or other utilities.
boot node only
PyYAML yum -y install PyYAML Needed for Terraform automation

NOTE: java will be openjdk7 or openjdk8 for ppc and s390x, and will not provide a JIT. This might be perceived as a performance issue, and can be resolved by switching to the IBM JDK & JRE.